Earlier quoted context omitted.
I think the point they're making is that the Go community is unusually pitchfork-ey. Having used Go since pre-1.0 days, I certainly agree; there's a very strong sense of, "if you want , you're doing it wrong" - despite legitimate concerns, like the ones outlined in this article.
I've heard this same criticism levelled at the Clojure community, as well. Honestly, I can't think of any language community that's developed such a reputation for pitchforkiness towards suggestions as the Go and Clojure communities.
A macro system in a homoiconic language allows you to implement many types of semantic sugar or things that would be full-on 'language features' in other languages as a simple library. See core.async: https://github.com/clojure/core.async